diff options
Diffstat (limited to 'target/linux/octeontx/patches-5.4/0003-can-mcp251x-convert-to-half-duplex-SPI.patch')
| -rw-r--r-- | target/linux/octeontx/patches-5.4/0003-can-mcp251x-convert-to-half-duplex-SPI.patch | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/target/linux/octeontx/patches-5.4/0003-can-mcp251x-convert-to-half-duplex-SPI.patch b/target/linux/octeontx/patches-5.4/0003-can-mcp251x-convert-to-half-duplex-SPI.patch deleted file mode 100644 index f760b2ac9a..0000000000 --- a/target/linux/octeontx/patches-5.4/0003-can-mcp251x-convert-to-half-duplex-SPI.patch +++ /dev/null @@ -1,57 +0,0 @@ -From 097cc81ee5c15913ad330baffff2e3dea09bdad0 Mon Sep 17 00:00:00 2001 -From: Tim Harvey <tharvey@gateworks.com> -Date: Thu, 30 Aug 2018 15:16:08 -0700 -Subject: [PATCH] can: mcp251x: convert driver to half-duplex SPI - -Some SPI host controllers such as the Cavium Thunder TX do not support -full-duplex SPI. Using half-duplex transfers allows the driver to work -with those host controllers. - -Signed-off-by: Tim Harvey <tharvey@gateworks.com> ---- - drivers/net/can/spi/mcp251x.c | 15 ++++++++------- - 1 file changed, 8 insertions(+), 7 deletions(-) - ---- a/drivers/net/can/spi/mcp251x.c -+++ b/drivers/net/can/spi/mcp251x.c -@@ -291,23 +291,23 @@ static u8 mcp251x_read_reg(struct spi_de - priv->spi_tx_buf[0] = INSTRUCTION_READ; - priv->spi_tx_buf[1] = reg; - -- mcp251x_spi_trans(spi, 3); -- val = priv->spi_rx_buf[2]; -+ spi_write_then_read(spi, priv->spi_tx_buf, 2, &val, 1); - - return val; - } - - static void mcp251x_read_2regs(struct spi_device *spi, u8 reg, u8 *v1, u8 *v2) - { -+ u8 val[4] = {0}; - struct mcp251x_priv *priv = spi_get_drvdata(spi); - - priv->spi_tx_buf[0] = INSTRUCTION_READ; - priv->spi_tx_buf[1] = reg; - -- mcp251x_spi_trans(spi, 4); -+ spi_write_then_read(spi, priv->spi_tx_buf, 2, val, 2); - -- *v1 = priv->spi_rx_buf[2]; -- *v2 = priv->spi_rx_buf[3]; -+ *v1 = val[0]; -+ *v2 = val[1]; - } - - static void mcp251x_write_reg(struct spi_device *spi, u8 reg, u8 val) -@@ -398,8 +398,9 @@ static void mcp251x_hw_rx_frame(struct s - buf[i] = mcp251x_read_reg(spi, RXBCTRL(buf_idx) + i); - } else { - priv->spi_tx_buf[RXBCTRL_OFF] = INSTRUCTION_READ_RXB(buf_idx); -- mcp251x_spi_trans(spi, SPI_TRANSFER_BUF_LEN); -- memcpy(buf, priv->spi_rx_buf, SPI_TRANSFER_BUF_LEN); -+ spi_write_then_read(spi, priv->spi_tx_buf, 1, priv->spi_rx_buf, -+ SPI_TRANSFER_BUF_LEN); -+ memcpy(buf + 1, priv->spi_rx_buf, SPI_TRANSFER_BUF_LEN - 1); - } - } - |